The World Around Us

A Mockingbird from Galápagos Islands, collected by Charles Darwin

Illustration of a Mockingbird (Nesomimus melanotis) collected by Charles Darwin from San Cristobal, Galápagos. The first time he expressed doubts about the fixity of species occurred when he was examining the Mockingbirds from the different islands in the archipelago.

Credit: Gould, John (1839)